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| Patents Granted on 1823-08-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,743X | Aug. 21, 1823 | J. Brown | Chimney fire extinguisher | fire extinguishers | |
| NX-182,308,211 | Aug. 21, 1823 | D. Berrien | Extinguishing fires in chimneys | fire extinguishers | |
| NX-182,308,212 | Aug. 21, 1823 | N. Barrett | Machine for hulling grain | grain hullers | |
| NX-182,308,213 | Aug. 21, 1823 | L. Gillet | Backs for forges and furnaces | forges | |